[Overview][Constants][Types][Classes][Procedures and functions][Index] Reference for unit 'math' (#rtl)

IsNan

Check whether value is Not a Number

Declaration

Source position: math.pp line 235

function IsNan(

  const d: Single

):Boolean; overload;

function IsNan(

  const d: Double

):Boolean; overload;

function IsNan(

  const d: Extended

):Boolean; overload;

Description

IsNan returns True if the double d contains Not A Number (a value which cannot be represented correctly in double format).

See also

IsZero

  

Check whether value is zero

IsInfinite

  

Check whether value is infinite


Documentation generated on: Nov 14 2015